Can someone lease tell me the answer to this question i'm abt to ask? what is 1 + 1/4?

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?